GRAVITY K-band spectroscopy of HD 206893 B - Brown dwarf or exoplanet J. Kammerer, S. Lacour, T. Stolker, P. Mollière, D. K. Sing, E. Nasedkin, P. Kervella, J. J. Wang, K. Ward-Duong, M. Nowak et al. (86 more) A&A, 652 (2021) A57 Published online: 10 August 2021 DOI: 10.1051/0004-6361/202140749